3988679 has 2 divisors, whose sum is σ = 3988680. Its totient is φ = 3988678.

The previous prime is 3988667. The next prime is 3988681. The reversal of 3988679 is 9768893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3988679 is a prime.

Together with 3988681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3988619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994339 + 1994340.

It is an arithmetic number, because the mean of its divisors is an integer number (1994340).

Almost surely, 2^3988679 is an apocalyptic number.

3988679 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988679 is an equidigital number, since it uses as much as digits as its factorization.

3988679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 3988679 is about 1997.1677445823. The cubic root of 3988679 is about 158.5902056291.

The spelling of 3988679 in words is "three million, nine hundred eighty-eight thousand, six hundred seventy-nine".